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Bats have great economic and environmental importance, including nocturnal insect control, pollination, seed dispersal and forest regeneration. Bats, however, like insects and birds are suffering a precipitous global decline due to anthropogenic causes. Deliberate air pollution in the form of undisclosed tropospheric aerosol geoengineering (TAG) has extremely damaging effects throughout the biosphere. Forensic scientific evidence implicates coal fly ash (CFA), the toxic waste product of coal-burning, as the main constituent of the jet-sprayed particulate trails seen around the world. Coal fly ash is a primary source of the ultrafine and nano-sized particulate fraction of air pollution that adversely impacts human and environmental health. Recently, countless exogenous magnetic pollution particles from combustion sources were found in human brains and heart tissue. Previous studies reveal that aerosolized CFA is a significant factor in the catastrophic global decline of birds and insects. Insects can accumulate aerosolized CFA on their body surfaces and/or ingest CFA particulates that insectivorous bats then consume. Bats are excellent mammalian bioindicators of environmental contaminants and it is known that their tissue contains high levels of metals and persistent organic pollutants. From a review of the literature, we show that the pollutant element ratios in bat tissue and bat guano are consistent with an origin in CFA-type air pollution. These findings suggest that CFA, including its use in covert climate engineering operations, is an unacknowledged factor in the morbidity and mortality of bats. Bats, therefore, are an important "canary in the coal mine" pointing to the urgency of halting covert climate engineering and greatly reducing ultrafine particulate air pollution.
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